GMDSS Maintainer: Element 9

1. A Two alternating sidebands of 1615 Hz and 1785 Hz are offset from the carrier frequency by 1700 Hz.
2. B The carrier frequency is alternately shifted from + 85 Hz to – 85 Hz while suppressing the sidebands.
3. C There is one 1500 Hz sideband which is shifted from +170 Hz to – 170 Hz with a suppressed carrier.
4. D Two alternating sidebands of 1500 Hz and 2300 Hz are offset from the carrier frequency by 1900 Hz.

Tip: press A-D to answer